Eugen jettek



UNITED STATES Patented anuary 12, 1904.

PATENT OFFICE.

EUGEN JETTER, OF ERFURT, GERMANY.

SPECIFICATION forming part of Letters Patent No. 749,297, dated January 12, 1904.

Application filed March 14, 1903.

which is especially adapted to form a cheap and excellent surrogate for whalebone is obtained.

i The process consists in filling the raw skins with gluey substancesas, for instance, gelatin, glue, isinglass, and the like-and with nitrocellulose, whereafter the skins, as well as the substances with which the same are filled,

are made insoluble.

.five per cent. of the gluey substances, must be very thin, which may be attained by heating the same or adding a few drops of acetic acid.

After the skins have remained one or two days in this solution they are brought into a soludissolved in glacial acetic acid the nitrocellulose can penetrate into the fibers.

By the Serial No. 147,858. (Specimens) skins being brought into these solutions they swell and take up a relatively great quantity of these solutions. Thereafter the skins are dried and afterward brought in a solution by means of which the skins, as well as the substances contained in the same, are made insoluble-as, for instance, a diluted solution of chlorid of aluminium. This solution may contain from one-half to two per cent. of chlorid of aluminium. It will be understood that any other convenient tanning material may be used for this purpose. In this solution the skins remain six hours. Thereafter they are taken out and dried or pressed. The skins then form a more or less transparent horn or whalebone like material of great elasticity and tenacity.

Having thus fully described the nature of my invention, what I desire to secure by Letters Patent of the United States is The process of preparing a horn-like material from raw skins, consisting in bringing the skins into a liquid solution of gluey substances and into a solution of collodion in glacial acetic acid, drying the skins and bringing the same into a solution by means of which the skins as well as the substances taken up by the same are made insoluble, substantially as described-and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EUGEN J ETTER. 

